Fix MSVC implicit include flags and leveldb patch command

Author: AustinBenoit

app/CMakeLists.txt

@@ -315,7 +315,9 @@ endif()
 # used to ensure these C/C++ headers are not passed to the Swift compiler.
 if(MSVC)
   add_compile_options(
-    $<$<COMPILE_LANGUAGE:CXX>:/FI"assert.h" /FI"string.h" /FI"stdint.h">)
+    $<$<COMPILE_LANGUAGE:CXX>:/FI"assert.h">
+    $<$<COMPILE_LANGUAGE:CXX>:/FI"string.h">
+    $<$<COMPILE_LANGUAGE:CXX>:/FI"stdint.h">)
 elseif(APPLE)
   add_compile_options(
     "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include assert.h>"

cmake/external/leveldb.cmake

@@ -21,6 +21,9 @@ endif()
 if (DESKTOP AND MSVC)
 set(patch_file 
   ${CMAKE_CURRENT_LIST_DIR}/../../scripts/git/patches/leveldb/0001-leveldb-1.23-windows-paths.patch)
+set(leveldb_patch_cmd PATCH_COMMAND git apply ${patch_file} && git gc --aggressive)
+else()
+set(leveldb_patch_cmd "")
 endif()
 
 # This version must be kept in sync with the version in firestore.patch.txt.
@@ -42,5 +45,5 @@ ExternalProject_Add(
   INSTALL_COMMAND   ""
   TEST_COMMAND      ""
   HTTP_HEADER "${EXTERNAL_PROJECT_HTTP_HEADER}"
-  PATCH_COMMAND git apply ${patch_file} && git gc --aggressive
+  ${leveldb_patch_cmd}
 )